Kconfig 44 KB

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  1. #
  2. # For a description of the syntax of this configuration file,
  3. # see Documentation/kbuild/kconfig-language.txt.
  4. #
  5. mainmenu "Linux Kernel Configuration"
  6. config ARM
  7. bool
  8. default y
  9. select HAVE_AOUT
  10. select HAVE_IDE
  11. select RTC_LIB
  12. select SYS_SUPPORTS_APM_EMULATION
  13. select GENERIC_ATOMIC64 if (!CPU_32v6K)
  14. select HAVE_OPROFILE
  15. select HAVE_ARCH_KGDB
  16. select HAVE_KPROBES if (!XIP_KERNEL)
  17. select HAVE_KRETPROBES if (HAVE_KPROBES)
  18. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  19. select HAVE_GENERIC_DMA_COHERENT
  20. select HAVE_KERNEL_GZIP
  21. select HAVE_KERNEL_LZO
  22. select HAVE_KERNEL_LZMA
  23. select HAVE_PERF_EVENTS
  24. select PERF_USE_VMALLOC
  25. help
  26. The ARM series is a line of low-power-consumption RISC chip designs
  27. licensed by ARM Ltd and targeted at embedded applications and
  28. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  29. manufactured, but legacy ARM-based PC hardware remains popular in
  30. Europe. There is an ARM Linux project with a web page at
  31. <http://www.arm.linux.org.uk/>.
  32. config HAVE_PWM
  33. bool
  34. config SYS_SUPPORTS_APM_EMULATION
  35. bool
  36. config GENERIC_GPIO
  37. bool
  38. config GENERIC_TIME
  39. bool
  40. default y
  41. config ARCH_USES_GETTIMEOFFSET
  42. bool
  43. default n
  44. config GENERIC_CLOCKEVENTS
  45. bool
  46. config GENERIC_CLOCKEVENTS_BROADCAST
  47. bool
  48. depends on GENERIC_CLOCKEVENTS
  49. default y if SMP && !LOCAL_TIMERS
  50. config HAVE_TCM
  51. bool
  52. select GENERIC_ALLOCATOR
  53. config HAVE_PROC_CPU
  54. bool
  55. config NO_IOPORT
  56. bool
  57. config EISA
  58. bool
  59. ---help---
  60. The Extended Industry Standard Architecture (EISA) bus was
  61. developed as an open alternative to the IBM MicroChannel bus.
  62. The EISA bus provided some of the features of the IBM MicroChannel
  63. bus while maintaining backward compatibility with cards made for
  64. the older ISA bus. The EISA bus saw limited use between 1988 and
  65. 1995 when it was made obsolete by the PCI bus.
  66. Say Y here if you are building a kernel for an EISA-based machine.
  67. Otherwise, say N.
  68. config SBUS
  69. bool
  70. config MCA
  71. bool
  72. help
  73. MicroChannel Architecture is found in some IBM PS/2 machines and
  74. laptops. It is a bus system similar to PCI or ISA. See
  75. <file:Documentation/mca.txt> (and especially the web page given
  76. there) before attempting to build an MCA bus kernel.
  77. config GENERIC_HARDIRQS
  78. bool
  79. default y
  80. config STACKTRACE_SUPPORT
  81. bool
  82. default y
  83. config HAVE_LATENCYTOP_SUPPORT
  84. bool
  85. depends on !SMP
  86. default y
  87. config LOCKDEP_SUPPORT
  88. bool
  89. default y
  90. config TRACE_IRQFLAGS_SUPPORT
  91. bool
  92. default y
  93. config HARDIRQS_SW_RESEND
  94. bool
  95. default y
  96. config GENERIC_IRQ_PROBE
  97. bool
  98. default y
  99. config GENERIC_LOCKBREAK
  100. bool
  101. default y
  102. depends on SMP && PREEMPT
  103. config RWSEM_GENERIC_SPINLOCK
  104. bool
  105. default y
  106. config RWSEM_XCHGADD_ALGORITHM
  107. bool
  108. config ARCH_HAS_ILOG2_U32
  109. bool
  110. config ARCH_HAS_ILOG2_U64
  111. bool
  112. config ARCH_HAS_CPUFREQ
  113. bool
  114. help
  115. Internal node to signify that the ARCH has CPUFREQ support
  116. and that the relevant menu configurations are displayed for
  117. it.
  118. config GENERIC_HWEIGHT
  119. bool
  120. default y
  121. config GENERIC_CALIBRATE_DELAY
  122. bool
  123. default y
  124. config ARCH_MAY_HAVE_PC_FDC
  125. bool
  126. config ZONE_DMA
  127. bool
  128. config NEED_DMA_MAP_STATE
  129. def_bool y
  130. config GENERIC_ISA_DMA
  131. bool
  132. config FIQ
  133. bool
  134. config ARCH_MTD_XIP
  135. bool
  136. config GENERIC_HARDIRQS_NO__DO_IRQ
  137. def_bool y
  138. config ARM_L1_CACHE_SHIFT_6
  139. bool
  140. help
  141. Setting ARM L1 cache line size to 64 Bytes.
  142. if OPROFILE
  143. config OPROFILE_ARMV6
  144. def_bool y
  145. depends on CPU_V6 && !SMP
  146. select OPROFILE_ARM11_CORE
  147. config OPROFILE_MPCORE
  148. def_bool y
  149. depends on CPU_V6 && SMP
  150. select OPROFILE_ARM11_CORE
  151. config OPROFILE_ARM11_CORE
  152. bool
  153. config OPROFILE_ARMV7
  154. def_bool y
  155. depends on CPU_V7 && !SMP
  156. bool
  157. endif
  158. config VECTORS_BASE
  159. hex
  160. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  161. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  162. default 0x00000000
  163. help
  164. The base address of exception vectors.
  165. source "init/Kconfig"
  166. source "kernel/Kconfig.freezer"
  167. menu "System Type"
  168. config MMU
  169. bool "MMU-based Paged Memory Management Support"
  170. default y
  171. help
  172. Select if you want MMU-based virtualised addressing space
  173. support by paged memory management. If unsure, say 'Y'.
  174. #
  175. # The "ARM system type" choice list is ordered alphabetically by option
  176. # text. Please add new entries in the option alphabetic order.
  177. #
  178. choice
  179. prompt "ARM system type"
  180. default ARCH_VERSATILE
  181. config ARCH_AAEC2000
  182. bool "Agilent AAEC-2000 based"
  183. select CPU_ARM920T
  184. select ARM_AMBA
  185. select HAVE_CLK
  186. select ARCH_USES_GETTIMEOFFSET
  187. help
  188. This enables support for systems based on the Agilent AAEC-2000
  189. config ARCH_INTEGRATOR
  190. bool "ARM Ltd. Integrator family"
  191. select ARM_AMBA
  192. select ARCH_HAS_CPUFREQ
  193. select COMMON_CLKDEV
  194. select ICST
  195. select GENERIC_TIME
  196. select GENERIC_CLOCKEVENTS
  197. select PLAT_VERSATILE
  198. help
  199. Support for ARM's Integrator platform.
  200. config ARCH_REALVIEW
  201. bool "ARM Ltd. RealView family"
  202. select ARM_AMBA
  203. select COMMON_CLKDEV
  204. select ICST
  205. select GENERIC_TIME
  206. select GENERIC_CLOCKEVENTS
  207. select ARCH_WANT_OPTIONAL_GPIOLIB
  208. select PLAT_VERSATILE
  209. select ARM_TIMER_SP804
  210. help
  211. This enables support for ARM Ltd RealView boards.
  212. config ARCH_VERSATILE
  213. bool "ARM Ltd. Versatile family"
  214. select ARM_AMBA
  215. select ARM_VIC
  216. select COMMON_CLKDEV
  217. select ICST
  218. select GENERIC_TIME
  219. select GENERIC_CLOCKEVENTS
  220. select ARCH_WANT_OPTIONAL_GPIOLIB
  221. select PLAT_VERSATILE
  222. select ARM_TIMER_SP804
  223. help
  224. This enables support for ARM Ltd Versatile board.
  225. config ARCH_VEXPRESS
  226. bool "ARM Ltd. Versatile Express family"
  227. select ARCH_WANT_OPTIONAL_GPIOLIB
  228. select ARM_AMBA
  229. select ARM_TIMER_SP804
  230. select COMMON_CLKDEV
  231. select GENERIC_CLOCKEVENTS
  232. select GENERIC_TIME
  233. select HAVE_CLK
  234. select ICST
  235. select PLAT_VERSATILE
  236. help
  237. This enables support for the ARM Ltd Versatile Express boards.
  238. config ARCH_AT91
  239. bool "Atmel AT91"
  240. select ARCH_REQUIRE_GPIOLIB
  241. select HAVE_CLK
  242. select ARCH_USES_GETTIMEOFFSET
  243. help
  244. This enables support for systems based on the Atmel AT91RM9200,
  245. AT91SAM9 and AT91CAP9 processors.
  246. config ARCH_BCMRING
  247. bool "Broadcom BCMRING"
  248. depends on MMU
  249. select CPU_V6
  250. select ARM_AMBA
  251. select COMMON_CLKDEV
  252. select GENERIC_TIME
  253. select GENERIC_CLOCKEVENTS
  254. select ARCH_WANT_OPTIONAL_GPIOLIB
  255. help
  256. Support for Broadcom's BCMRing platform.
  257. config ARCH_CLPS711X
  258. bool "Cirrus Logic CLPS711x/EP721x-based"
  259. select CPU_ARM720T
  260. select ARCH_USES_GETTIMEOFFSET
  261. help
  262. Support for Cirrus Logic 711x/721x based boards.
  263. config ARCH_GEMINI
  264. bool "Cortina Systems Gemini"
  265. select CPU_FA526
  266. select ARCH_REQUIRE_GPIOLIB
  267. select ARCH_USES_GETTIMEOFFSET
  268. help
  269. Support for the Cortina Systems Gemini family SoCs
  270. config ARCH_EBSA110
  271. bool "EBSA-110"
  272. select CPU_SA110
  273. select ISA
  274. select NO_IOPORT
  275. select ARCH_USES_GETTIMEOFFSET
  276. help
  277. This is an evaluation board for the StrongARM processor available
  278. from Digital. It has limited hardware on-board, including an
  279. Ethernet interface, two PCMCIA sockets, two serial ports and a
  280. parallel port.
  281. config ARCH_EP93XX
  282. bool "EP93xx-based"
  283. select CPU_ARM920T
  284. select ARM_AMBA
  285. select ARM_VIC
  286. select COMMON_CLKDEV
  287. select ARCH_REQUIRE_GPIOLIB
  288. select ARCH_HAS_HOLES_MEMORYMODEL
  289. select ARCH_USES_GETTIMEOFFSET
  290. help
  291. This enables support for the Cirrus EP93xx series of CPUs.
  292. config ARCH_FOOTBRIDGE
  293. bool "FootBridge"
  294. select CPU_SA110
  295. select FOOTBRIDGE
  296. select ARCH_USES_GETTIMEOFFSET
  297. help
  298. Support for systems based on the DC21285 companion chip
  299. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  300. config ARCH_MXC
  301. bool "Freescale MXC/iMX-based"
  302. select GENERIC_TIME
  303. select GENERIC_CLOCKEVENTS
  304. select ARCH_REQUIRE_GPIOLIB
  305. select COMMON_CLKDEV
  306. help
  307. Support for Freescale MXC/iMX-based family of processors
  308. config ARCH_STMP3XXX
  309. bool "Freescale STMP3xxx"
  310. select CPU_ARM926T
  311. select COMMON_CLKDEV
  312. select ARCH_REQUIRE_GPIOLIB
  313. select GENERIC_TIME
  314. select GENERIC_CLOCKEVENTS
  315. select USB_ARCH_HAS_EHCI
  316. help
  317. Support for systems based on the Freescale 3xxx CPUs.
  318. config ARCH_NETX
  319. bool "Hilscher NetX based"
  320. select CPU_ARM926T
  321. select ARM_VIC
  322. select GENERIC_CLOCKEVENTS
  323. select GENERIC_TIME
  324. help
  325. This enables support for systems based on the Hilscher NetX Soc
  326. config ARCH_H720X
  327. bool "Hynix HMS720x-based"
  328. select CPU_ARM720T
  329. select ISA_DMA_API
  330. select ARCH_USES_GETTIMEOFFSET
  331. help
  332. This enables support for systems based on the Hynix HMS720x
  333. config ARCH_IOP13XX
  334. bool "IOP13xx-based"
  335. depends on MMU
  336. select CPU_XSC3
  337. select PLAT_IOP
  338. select PCI
  339. select ARCH_SUPPORTS_MSI
  340. select VMSPLIT_1G
  341. help
  342. Support for Intel's IOP13XX (XScale) family of processors.
  343. config ARCH_IOP32X
  344. bool "IOP32x-based"
  345. depends on MMU
  346. select CPU_XSCALE
  347. select PLAT_IOP
  348. select PCI
  349. select ARCH_REQUIRE_GPIOLIB
  350. help
  351. Support for Intel's 80219 and IOP32X (XScale) family of
  352. processors.
  353. config ARCH_IOP33X
  354. bool "IOP33x-based"
  355. depends on MMU
  356. select CPU_XSCALE
  357. select PLAT_IOP
  358. select PCI
  359. select ARCH_REQUIRE_GPIOLIB
  360. help
  361. Support for Intel's IOP33X (XScale) family of processors.
  362. config ARCH_IXP23XX
  363. bool "IXP23XX-based"
  364. depends on MMU
  365. select CPU_XSC3
  366. select PCI
  367. select ARCH_USES_GETTIMEOFFSET
  368. help
  369. Support for Intel's IXP23xx (XScale) family of processors.
  370. config ARCH_IXP2000
  371. bool "IXP2400/2800-based"
  372. depends on MMU
  373. select CPU_XSCALE
  374. select PCI
  375. select ARCH_USES_GETTIMEOFFSET
  376. help
  377. Support for Intel's IXP2400/2800 (XScale) family of processors.
  378. config ARCH_IXP4XX
  379. bool "IXP4xx-based"
  380. depends on MMU
  381. select CPU_XSCALE
  382. select GENERIC_GPIO
  383. select GENERIC_TIME
  384. select GENERIC_CLOCKEVENTS
  385. select DMABOUNCE if PCI
  386. help
  387. Support for Intel's IXP4XX (XScale) family of processors.
  388. config ARCH_L7200
  389. bool "LinkUp-L7200"
  390. select CPU_ARM720T
  391. select FIQ
  392. select ARCH_USES_GETTIMEOFFSET
  393. help
  394. Say Y here if you intend to run this kernel on a LinkUp Systems
  395. L7200 Software Development Board which uses an ARM720T processor.
  396. Information on this board can be obtained at:
  397. <http://www.linkupsys.com/>
  398. If you have any questions or comments about the Linux kernel port
  399. to this board, send e-mail to <sjhill@cotw.com>.
  400. config ARCH_DOVE
  401. bool "Marvell Dove"
  402. select PCI
  403. select ARCH_REQUIRE_GPIOLIB
  404. select GENERIC_TIME
  405. select GENERIC_CLOCKEVENTS
  406. select PLAT_ORION
  407. help
  408. Support for the Marvell Dove SoC 88AP510
  409. config ARCH_KIRKWOOD
  410. bool "Marvell Kirkwood"
  411. select CPU_FEROCEON
  412. select PCI
  413. select ARCH_REQUIRE_GPIOLIB
  414. select GENERIC_TIME
  415. select GENERIC_CLOCKEVENTS
  416. select PLAT_ORION
  417. help
  418. Support for the following Marvell Kirkwood series SoCs:
  419. 88F6180, 88F6192 and 88F6281.
  420. config ARCH_LOKI
  421. bool "Marvell Loki (88RC8480)"
  422. select CPU_FEROCEON
  423. select GENERIC_TIME
  424. select GENERIC_CLOCKEVENTS
  425. select PLAT_ORION
  426. help
  427. Support for the Marvell Loki (88RC8480) SoC.
  428. config ARCH_MV78XX0
  429. bool "Marvell MV78xx0"
  430. select CPU_FEROCEON
  431. select PCI
  432. select ARCH_REQUIRE_GPIOLIB
  433. select GENERIC_TIME
  434. select GENERIC_CLOCKEVENTS
  435. select PLAT_ORION
  436. help
  437. Support for the following Marvell MV78xx0 series SoCs:
  438. MV781x0, MV782x0.
  439. config ARCH_ORION5X
  440. bool "Marvell Orion"
  441. depends on MMU
  442. select CPU_FEROCEON
  443. select PCI
  444. select ARCH_REQUIRE_GPIOLIB
  445. select GENERIC_TIME
  446. select GENERIC_CLOCKEVENTS
  447. select PLAT_ORION
  448. help
  449. Support for the following Marvell Orion 5x series SoCs:
  450. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  451. Orion-2 (5281), Orion-1-90 (6183).
  452. config ARCH_MMP
  453. bool "Marvell PXA168/910/MMP2"
  454. depends on MMU
  455. select ARCH_REQUIRE_GPIOLIB
  456. select COMMON_CLKDEV
  457. select GENERIC_TIME
  458. select GENERIC_CLOCKEVENTS
  459. select TICK_ONESHOT
  460. select PLAT_PXA
  461. help
  462. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  463. config ARCH_KS8695
  464. bool "Micrel/Kendin KS8695"
  465. select CPU_ARM922T
  466. select ARCH_REQUIRE_GPIOLIB
  467. select ARCH_USES_GETTIMEOFFSET
  468. help
  469. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  470. System-on-Chip devices.
  471. config ARCH_NS9XXX
  472. bool "NetSilicon NS9xxx"
  473. select CPU_ARM926T
  474. select GENERIC_GPIO
  475. select GENERIC_TIME
  476. select GENERIC_CLOCKEVENTS
  477. select HAVE_CLK
  478. help
  479. Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
  480. System.
  481. <http://www.digi.com/products/microprocessors/index.jsp>
  482. config ARCH_W90X900
  483. bool "Nuvoton W90X900 CPU"
  484. select CPU_ARM926T
  485. select ARCH_REQUIRE_GPIOLIB
  486. select COMMON_CLKDEV
  487. select GENERIC_TIME
  488. select GENERIC_CLOCKEVENTS
  489. help
  490. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  491. At present, the w90x900 has been renamed nuc900, regarding
  492. the ARM series product line, you can login the following
  493. link address to know more.
  494. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  495. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  496. config ARCH_NUC93X
  497. bool "Nuvoton NUC93X CPU"
  498. select CPU_ARM926T
  499. select COMMON_CLKDEV
  500. help
  501. Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
  502. low-power and high performance MPEG-4/JPEG multimedia controller chip.
  503. config ARCH_PNX4008
  504. bool "Philips Nexperia PNX4008 Mobile"
  505. select CPU_ARM926T
  506. select COMMON_CLKDEV
  507. select ARCH_USES_GETTIMEOFFSET
  508. help
  509. This enables support for Philips PNX4008 mobile platform.
  510. config ARCH_PXA
  511. bool "PXA2xx/PXA3xx-based"
  512. depends on MMU
  513. select ARCH_MTD_XIP
  514. select ARCH_HAS_CPUFREQ
  515. select COMMON_CLKDEV
  516. select ARCH_REQUIRE_GPIOLIB
  517. select GENERIC_TIME
  518. select GENERIC_CLOCKEVENTS
  519. select TICK_ONESHOT
  520. select PLAT_PXA
  521. help
  522. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  523. config ARCH_MSM
  524. bool "Qualcomm MSM"
  525. select CPU_V6
  526. select GENERIC_TIME
  527. select GENERIC_CLOCKEVENTS
  528. help
  529. Support for Qualcomm MSM7K based systems. This runs on the ARM11
  530. apps processor of the MSM7K and depends on a shared memory
  531. interface to the ARM9 modem processor which runs the baseband stack
  532. and controls some vital subsystems (clock and power control, etc).
  533. config ARCH_SHMOBILE
  534. bool "Renesas SH-Mobile"
  535. help
  536. Support for Renesas's SH-Mobile ARM platforms
  537. config ARCH_RPC
  538. bool "RiscPC"
  539. select ARCH_ACORN
  540. select FIQ
  541. select TIMER_ACORN
  542. select ARCH_MAY_HAVE_PC_FDC
  543. select HAVE_PATA_PLATFORM
  544. select ISA_DMA_API
  545. select NO_IOPORT
  546. select ARCH_SPARSEMEM_ENABLE
  547. select ARCH_USES_GETTIMEOFFSET
  548. help
  549. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  550. CD-ROM interface, serial and parallel port, and the floppy drive.
  551. config ARCH_SA1100
  552. bool "SA1100-based"
  553. select CPU_SA1100
  554. select ISA
  555. select ARCH_SPARSEMEM_ENABLE
  556. select ARCH_MTD_XIP
  557. select ARCH_HAS_CPUFREQ
  558. select CPU_FREQ
  559. select GENERIC_TIME
  560. select GENERIC_CLOCKEVENTS
  561. select HAVE_CLK
  562. select TICK_ONESHOT
  563. select ARCH_REQUIRE_GPIOLIB
  564. help
  565. Support for StrongARM 11x0 based boards.
  566. config ARCH_S3C2410
  567. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
  568. select GENERIC_GPIO
  569. select ARCH_HAS_CPUFREQ
  570. select HAVE_CLK
  571. select ARCH_USES_GETTIMEOFFSET
  572. help
  573. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  574. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  575. the Samsung SMDK2410 development board (and derivatives).
  576. config ARCH_S3C64XX
  577. bool "Samsung S3C64XX"
  578. select PLAT_SAMSUNG
  579. select CPU_V6
  580. select ARM_VIC
  581. select HAVE_CLK
  582. select NO_IOPORT
  583. select ARCH_USES_GETTIMEOFFSET
  584. select ARCH_HAS_CPUFREQ
  585. select ARCH_REQUIRE_GPIOLIB
  586. select SAMSUNG_CLKSRC
  587. select SAMSUNG_IRQ_VIC_TIMER
  588. select SAMSUNG_IRQ_UART
  589. select S3C_GPIO_TRACK
  590. select S3C_GPIO_PULL_UPDOWN
  591. select S3C_GPIO_CFG_S3C24XX
  592. select S3C_GPIO_CFG_S3C64XX
  593. select S3C_DEV_NAND
  594. select USB_ARCH_HAS_OHCI
  595. select SAMSUNG_GPIOLIB_4BIT
  596. help
  597. Samsung S3C64XX series based systems
  598. config ARCH_S5P6440
  599. bool "Samsung S5P6440"
  600. select CPU_V6
  601. select GENERIC_GPIO
  602. select HAVE_CLK
  603. help
  604. Samsung S5P6440 CPU based systems
  605. config ARCH_S5P6442
  606. bool "Samsung S5P6442"
  607. select CPU_V6
  608. select GENERIC_GPIO
  609. select HAVE_CLK
  610. help
  611. Samsung S5P6442 CPU based systems
  612. config ARCH_S5PC1XX
  613. bool "Samsung S5PC1XX"
  614. select GENERIC_GPIO
  615. select HAVE_CLK
  616. select CPU_V7
  617. select ARM_L1_CACHE_SHIFT_6
  618. help
  619. Samsung S5PC1XX series based systems
  620. config ARCH_S5PV210
  621. bool "Samsung S5PV210/S5PC110"
  622. select CPU_V7
  623. select GENERIC_GPIO
  624. select HAVE_CLK
  625. select ARM_L1_CACHE_SHIFT_6
  626. help
  627. Samsung S5PV210/S5PC110 series based systems
  628. config ARCH_SHARK
  629. bool "Shark"
  630. select CPU_SA110
  631. select ISA
  632. select ISA_DMA
  633. select ZONE_DMA
  634. select PCI
  635. select ARCH_USES_GETTIMEOFFSET
  636. help
  637. Support for the StrongARM based Digital DNARD machine, also known
  638. as "Shark" (<http://www.shark-linux.de/shark.html>).
  639. config ARCH_LH7A40X
  640. bool "Sharp LH7A40X"
  641. select CPU_ARM922T
  642. select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
  643. select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
  644. select ARCH_USES_GETTIMEOFFSET
  645. help
  646. Say Y here for systems based on one of the Sharp LH7A40X
  647. System on a Chip processors. These CPUs include an ARM922T
  648. core with a wide array of integrated devices for
  649. hand-held and low-power applications.
  650. config ARCH_U300
  651. bool "ST-Ericsson U300 Series"
  652. depends on MMU
  653. select CPU_ARM926T
  654. select HAVE_TCM
  655. select ARM_AMBA
  656. select ARM_VIC
  657. select GENERIC_TIME
  658. select GENERIC_CLOCKEVENTS
  659. select COMMON_CLKDEV
  660. select GENERIC_GPIO
  661. help
  662. Support for ST-Ericsson U300 series mobile platforms.
  663. config ARCH_U8500
  664. bool "ST-Ericsson U8500 Series"
  665. select CPU_V7
  666. select ARM_AMBA
  667. select GENERIC_TIME
  668. select GENERIC_CLOCKEVENTS
  669. select COMMON_CLKDEV
  670. select ARCH_REQUIRE_GPIOLIB
  671. help
  672. Support for ST-Ericsson's Ux500 architecture
  673. config ARCH_NOMADIK
  674. bool "STMicroelectronics Nomadik"
  675. select ARM_AMBA
  676. select ARM_VIC
  677. select CPU_ARM926T
  678. select COMMON_CLKDEV
  679. select GENERIC_TIME
  680. select GENERIC_CLOCKEVENTS
  681. select ARCH_REQUIRE_GPIOLIB
  682. help
  683. Support for the Nomadik platform by ST-Ericsson
  684. config ARCH_DAVINCI
  685. bool "TI DaVinci"
  686. select CPU_ARM926T
  687. select GENERIC_TIME
  688. select GENERIC_CLOCKEVENTS
  689. select ARCH_REQUIRE_GPIOLIB
  690. select ZONE_DMA
  691. select HAVE_IDE
  692. select COMMON_CLKDEV
  693. select GENERIC_ALLOCATOR
  694. select ARCH_HAS_HOLES_MEMORYMODEL
  695. help
  696. Support for TI's DaVinci platform.
  697. config ARCH_OMAP
  698. bool "TI OMAP"
  699. select HAVE_CLK
  700. select ARCH_REQUIRE_GPIOLIB
  701. select ARCH_HAS_CPUFREQ
  702. select GENERIC_TIME
  703. select GENERIC_CLOCKEVENTS
  704. select ARCH_HAS_HOLES_MEMORYMODEL
  705. help
  706. Support for TI's OMAP platform (OMAP1 and OMAP2).
  707. config PLAT_SPEAR
  708. bool "ST SPEAr"
  709. select ARM_AMBA
  710. select ARCH_REQUIRE_GPIOLIB
  711. select COMMON_CLKDEV
  712. select GENERIC_CLOCKEVENTS
  713. select GENERIC_TIME
  714. select HAVE_CLK
  715. help
  716. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  717. endchoice
  718. #
  719. # This is sorted alphabetically by mach-* pathname. However, plat-*
  720. # Kconfigs may be included either alphabetically (according to the
  721. # plat- suffix) or along side the corresponding mach-* source.
  722. #
  723. source "arch/arm/mach-aaec2000/Kconfig"
  724. source "arch/arm/mach-at91/Kconfig"
  725. source "arch/arm/mach-bcmring/Kconfig"
  726. source "arch/arm/mach-clps711x/Kconfig"
  727. source "arch/arm/mach-davinci/Kconfig"
  728. source "arch/arm/mach-dove/Kconfig"
  729. source "arch/arm/mach-ep93xx/Kconfig"
  730. source "arch/arm/mach-footbridge/Kconfig"
  731. source "arch/arm/mach-gemini/Kconfig"
  732. source "arch/arm/mach-h720x/Kconfig"
  733. source "arch/arm/mach-integrator/Kconfig"
  734. source "arch/arm/mach-iop32x/Kconfig"
  735. source "arch/arm/mach-iop33x/Kconfig"
  736. source "arch/arm/mach-iop13xx/Kconfig"
  737. source "arch/arm/mach-ixp4xx/Kconfig"
  738. source "arch/arm/mach-ixp2000/Kconfig"
  739. source "arch/arm/mach-ixp23xx/Kconfig"
  740. source "arch/arm/mach-kirkwood/Kconfig"
  741. source "arch/arm/mach-ks8695/Kconfig"
  742. source "arch/arm/mach-lh7a40x/Kconfig"
  743. source "arch/arm/mach-loki/Kconfig"
  744. source "arch/arm/mach-msm/Kconfig"
  745. source "arch/arm/mach-mv78xx0/Kconfig"
  746. source "arch/arm/plat-mxc/Kconfig"
  747. source "arch/arm/mach-netx/Kconfig"
  748. source "arch/arm/mach-nomadik/Kconfig"
  749. source "arch/arm/plat-nomadik/Kconfig"
  750. source "arch/arm/mach-ns9xxx/Kconfig"
  751. source "arch/arm/mach-nuc93x/Kconfig"
  752. source "arch/arm/plat-omap/Kconfig"
  753. source "arch/arm/mach-omap1/Kconfig"
  754. source "arch/arm/mach-omap2/Kconfig"
  755. source "arch/arm/mach-orion5x/Kconfig"
  756. source "arch/arm/mach-pxa/Kconfig"
  757. source "arch/arm/plat-pxa/Kconfig"
  758. source "arch/arm/mach-mmp/Kconfig"
  759. source "arch/arm/mach-realview/Kconfig"
  760. source "arch/arm/mach-sa1100/Kconfig"
  761. source "arch/arm/plat-samsung/Kconfig"
  762. source "arch/arm/plat-s3c24xx/Kconfig"
  763. source "arch/arm/plat-s5p/Kconfig"
  764. source "arch/arm/plat-s5pc1xx/Kconfig"
  765. source "arch/arm/plat-spear/Kconfig"
  766. if ARCH_S3C2410
  767. source "arch/arm/mach-s3c2400/Kconfig"
  768. source "arch/arm/mach-s3c2410/Kconfig"
  769. source "arch/arm/mach-s3c2412/Kconfig"
  770. source "arch/arm/mach-s3c2440/Kconfig"
  771. source "arch/arm/mach-s3c2443/Kconfig"
  772. endif
  773. if ARCH_S3C64XX
  774. source "arch/arm/mach-s3c64xx/Kconfig"
  775. endif
  776. source "arch/arm/mach-s5p6440/Kconfig"
  777. source "arch/arm/mach-s5p6442/Kconfig"
  778. if ARCH_S5PC1XX
  779. source "arch/arm/mach-s5pc100/Kconfig"
  780. endif
  781. source "arch/arm/mach-s5pv210/Kconfig"
  782. source "arch/arm/mach-shmobile/Kconfig"
  783. source "arch/arm/plat-stmp3xxx/Kconfig"
  784. source "arch/arm/mach-u300/Kconfig"
  785. source "arch/arm/mach-ux500/Kconfig"
  786. source "arch/arm/mach-versatile/Kconfig"
  787. source "arch/arm/mach-vexpress/Kconfig"
  788. source "arch/arm/mach-w90x900/Kconfig"
  789. # Definitions to make life easier
  790. config ARCH_ACORN
  791. bool
  792. config PLAT_IOP
  793. bool
  794. select GENERIC_CLOCKEVENTS
  795. select GENERIC_TIME
  796. config PLAT_ORION
  797. bool
  798. config PLAT_PXA
  799. bool
  800. config PLAT_VERSATILE
  801. bool
  802. config ARM_TIMER_SP804
  803. bool
  804. source arch/arm/mm/Kconfig
  805. config IWMMXT
  806. bool "Enable iWMMXt support"
  807. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
  808. default y if PXA27x || PXA3xx || ARCH_MMP
  809. help
  810. Enable support for iWMMXt context switching at run time if
  811. running on a CPU that supports it.
  812. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  813. config XSCALE_PMU
  814. bool
  815. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  816. default y
  817. config CPU_HAS_PMU
  818. depends on CPU_V6 || CPU_V7 || XSCALE_PMU
  819. default y
  820. bool
  821. if !MMU
  822. source "arch/arm/Kconfig-nommu"
  823. endif
  824. config ARM_ERRATA_411920
  825. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  826. depends on CPU_V6 && !SMP
  827. help
  828. Invalidation of the Instruction Cache operation can
  829. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  830. It does not affect the MPCore. This option enables the ARM Ltd.
  831. recommended workaround.
  832. config ARM_ERRATA_430973
  833. bool "ARM errata: Stale prediction on replaced interworking branch"
  834. depends on CPU_V7
  835. help
  836. This option enables the workaround for the 430973 Cortex-A8
  837. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  838. interworking branch is replaced with another code sequence at the
  839. same virtual address, whether due to self-modifying code or virtual
  840. to physical address re-mapping, Cortex-A8 does not recover from the
  841. stale interworking branch prediction. This results in Cortex-A8
  842. executing the new code sequence in the incorrect ARM or Thumb state.
  843. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  844. and also flushes the branch target cache at every context switch.
  845. Note that setting specific bits in the ACTLR register may not be
  846. available in non-secure mode.
  847. config ARM_ERRATA_458693
  848. bool "ARM errata: Processor deadlock when a false hazard is created"
  849. depends on CPU_V7
  850. help
  851. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  852. erratum. For very specific sequences of memory operations, it is
  853. possible for a hazard condition intended for a cache line to instead
  854. be incorrectly associated with a different cache line. This false
  855. hazard might then cause a processor deadlock. The workaround enables
  856. the L1 caching of the NEON accesses and disables the PLD instruction
  857. in the ACTLR register. Note that setting specific bits in the ACTLR
  858. register may not be available in non-secure mode.
  859. config ARM_ERRATA_460075
  860. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  861. depends on CPU_V7
  862. help
  863. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  864. erratum. Any asynchronous access to the L2 cache may encounter a
  865. situation in which recent store transactions to the L2 cache are lost
  866. and overwritten with stale memory contents from external memory. The
  867. workaround disables the write-allocate mode for the L2 cache via the
  868. ACTLR register. Note that setting specific bits in the ACTLR register
  869. may not be available in non-secure mode.
  870. config PL310_ERRATA_588369
  871. bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
  872. depends on CACHE_L2X0 && ARCH_OMAP4
  873. help
  874. The PL310 L2 cache controller implements three types of Clean &
  875. Invalidate maintenance operations: by Physical Address
  876. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  877. They are architecturally defined to behave as the execution of a
  878. clean operation followed immediately by an invalidate operation,
  879. both performing to the same memory location. This functionality
  880. is not correctly implemented in PL310 as clean lines are not
  881. invalidated as a result of these operations. Note that this errata
  882. uses Texas Instrument's secure monitor api.
  883. endmenu
  884. source "arch/arm/common/Kconfig"
  885. config FORCE_MAX_ZONEORDER
  886. int
  887. depends on SA1111
  888. default "9"
  889. menu "Bus support"
  890. config ARM_AMBA
  891. bool
  892. config ISA
  893. bool
  894. help
  895. Find out whether you have ISA slots on your motherboard. ISA is the
  896. name of a bus system, i.e. the way the CPU talks to the other stuff
  897. inside your box. Other bus systems are PCI, EISA, MicroChannel
  898. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  899. newer boards don't support it. If you have ISA, say Y, otherwise N.
  900. # Select ISA DMA controller support
  901. config ISA_DMA
  902. bool
  903. select ISA_DMA_API
  904. # Select ISA DMA interface
  905. config ISA_DMA_API
  906. bool
  907. config PCI
  908. bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
  909. help
  910. Find out whether you have a PCI motherboard. PCI is the name of a
  911. bus system, i.e. the way the CPU talks to the other stuff inside
  912. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  913. VESA. If you have PCI, say Y, otherwise N.
  914. config PCI_DOMAINS
  915. bool
  916. depends on PCI
  917. config PCI_SYSCALL
  918. def_bool PCI
  919. # Select the host bridge type
  920. config PCI_HOST_VIA82C505
  921. bool
  922. depends on PCI && ARCH_SHARK
  923. default y
  924. config PCI_HOST_ITE8152
  925. bool
  926. depends on PCI && MACH_ARMCORE
  927. default y
  928. select DMABOUNCE
  929. source "drivers/pci/Kconfig"
  930. source "drivers/pcmcia/Kconfig"
  931. endmenu
  932. menu "Kernel Features"
  933. source "kernel/time/Kconfig"
  934. config SMP
  935. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  936. depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
  937. MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 ||\
  938. ARCH_U8500 || ARCH_VEXPRESS_CA9X4)
  939. depends on GENERIC_CLOCKEVENTS
  940. select USE_GENERIC_SMP_HELPERS
  941. select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500 || ARCH_VEXPRESS_CA9X4)
  942. help
  943. This enables support for systems with more than one CPU. If you have
  944. a system with only one CPU, like most personal computers, say N. If
  945. you have a system with more than one CPU, say Y.
  946. If you say N here, the kernel will run on single and multiprocessor
  947. machines, but will use only one CPU of a multiprocessor machine. If
  948. you say Y here, the kernel will run on many, but not all, single
  949. processor machines. On a single processor machine, the kernel will
  950. run faster if you say N here.
  951. See also <file:Documentation/i386/IO-APIC.txt>,
  952. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  953. <http://www.linuxdoc.org/docs.html#howto>.
  954. If you don't know what to do here, say N.
  955. config HAVE_ARM_SCU
  956. bool
  957. depends on SMP
  958. help
  959. This option enables support for the ARM system coherency unit
  960. config HAVE_ARM_TWD
  961. bool
  962. depends on SMP
  963. help
  964. This options enables support for the ARM timer and watchdog unit
  965. choice
  966. prompt "Memory split"
  967. default VMSPLIT_3G
  968. help
  969. Select the desired split between kernel and user memory.
  970. If you are not absolutely sure what you are doing, leave this
  971. option alone!
  972. config VMSPLIT_3G
  973. bool "3G/1G user/kernel split"
  974. config VMSPLIT_2G
  975. bool "2G/2G user/kernel split"
  976. config VMSPLIT_1G
  977. bool "1G/3G user/kernel split"
  978. endchoice
  979. config PAGE_OFFSET
  980. hex
  981. default 0x40000000 if VMSPLIT_1G
  982. default 0x80000000 if VMSPLIT_2G
  983. default 0xC0000000
  984. config NR_CPUS
  985. int "Maximum number of CPUs (2-32)"
  986. range 2 32
  987. depends on SMP
  988. default "4"
  989. config HOTPLUG_CPU
  990. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  991. depends on SMP && HOTPLUG && EXPERIMENTAL
  992. help
  993. Say Y here to experiment with turning CPUs off and on. CPUs
  994. can be controlled through /sys/devices/system/cpu.
  995. config LOCAL_TIMERS
  996. bool "Use local timer interrupts"
  997. depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
  998. REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
  999. default y
  1000. select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
  1001. help
  1002. Enable support for local timers on SMP platforms, rather then the
  1003. legacy IPI broadcast method. Local timers allows the system
  1004. accounting to be spread across the timer interval, preventing a
  1005. "thundering herd" at every timer tick.
  1006. source kernel/Kconfig.preempt
  1007. config HZ
  1008. int
  1009. default 128 if ARCH_L7200
  1010. default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P6440 || ARCH_S5P6442 || ARCH_S5PV210
  1011. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1012. default AT91_TIMER_HZ if ARCH_AT91
  1013. default 100
  1014. config THUMB2_KERNEL
  1015. bool "Compile the kernel in Thumb-2 mode"
  1016. depends on CPU_V7 && EXPERIMENTAL
  1017. select AEABI
  1018. select ARM_ASM_UNIFIED
  1019. help
  1020. By enabling this option, the kernel will be compiled in
  1021. Thumb-2 mode. A compiler/assembler that understand the unified
  1022. ARM-Thumb syntax is needed.
  1023. If unsure, say N.
  1024. config ARM_ASM_UNIFIED
  1025. bool
  1026. config AEABI
  1027. bool "Use the ARM EABI to compile the kernel"
  1028. help
  1029. This option allows for the kernel to be compiled using the latest
  1030. ARM ABI (aka EABI). This is only useful if you are using a user
  1031. space environment that is also compiled with EABI.
  1032. Since there are major incompatibilities between the legacy ABI and
  1033. EABI, especially with regard to structure member alignment, this
  1034. option also changes the kernel syscall calling convention to
  1035. disambiguate both ABIs and allow for backward compatibility support
  1036. (selected with CONFIG_OABI_COMPAT).
  1037. To use this you need GCC version 4.0.0 or later.
  1038. config OABI_COMPAT
  1039. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1040. depends on AEABI && EXPERIMENTAL
  1041. default y
  1042. help
  1043. This option preserves the old syscall interface along with the
  1044. new (ARM EABI) one. It also provides a compatibility layer to
  1045. intercept syscalls that have structure arguments which layout
  1046. in memory differs between the legacy ABI and the new ARM EABI
  1047. (only for non "thumb" binaries). This option adds a tiny
  1048. overhead to all syscalls and produces a slightly larger kernel.
  1049. If you know you'll be using only pure EABI user space then you
  1050. can say N here. If this option is not selected and you attempt
  1051. to execute a legacy ABI binary then the result will be
  1052. UNPREDICTABLE (in fact it can be predicted that it won't work
  1053. at all). If in doubt say Y.
  1054. config ARCH_HAS_HOLES_MEMORYMODEL
  1055. bool
  1056. # Discontigmem is deprecated
  1057. config ARCH_DISCONTIGMEM_ENABLE
  1058. bool
  1059. config ARCH_SPARSEMEM_ENABLE
  1060. bool
  1061. config ARCH_SPARSEMEM_DEFAULT
  1062. def_bool ARCH_SPARSEMEM_ENABLE
  1063. config ARCH_SELECT_MEMORY_MODEL
  1064. def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
  1065. config NODES_SHIFT
  1066. int
  1067. default "4" if ARCH_LH7A40X
  1068. default "2"
  1069. depends on NEED_MULTIPLE_NODES
  1070. config HIGHMEM
  1071. bool "High Memory Support (EXPERIMENTAL)"
  1072. depends on MMU && EXPERIMENTAL
  1073. help
  1074. The address space of ARM processors is only 4 Gigabytes large
  1075. and it has to accommodate user address space, kernel address
  1076. space as well as some memory mapped IO. That means that, if you
  1077. have a large amount of physical memory and/or IO, not all of the
  1078. memory can be "permanently mapped" by the kernel. The physical
  1079. memory that is not permanently mapped is called "high memory".
  1080. Depending on the selected kernel/user memory split, minimum
  1081. vmalloc space and actual amount of RAM, you may not need this
  1082. option which should result in a slightly faster kernel.
  1083. If unsure, say n.
  1084. config HIGHPTE
  1085. bool "Allocate 2nd-level pagetables from highmem"
  1086. depends on HIGHMEM
  1087. depends on !OUTER_CACHE
  1088. config HW_PERF_EVENTS
  1089. bool "Enable hardware performance counter support for perf events"
  1090. depends on PERF_EVENTS && CPU_HAS_PMU && (CPU_V6 || CPU_V7)
  1091. default y
  1092. help
  1093. Enable hardware performance counter support for perf events. If
  1094. disabled, perf events will use software events only.
  1095. source "mm/Kconfig"
  1096. config LEDS
  1097. bool "Timer and CPU usage LEDs"
  1098. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1099. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1100. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1101. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1102. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1103. ARCH_AT91 || ARCH_DAVINCI || \
  1104. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1105. help
  1106. If you say Y here, the LEDs on your machine will be used
  1107. to provide useful information about your current system status.
  1108. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1109. be able to select which LEDs are active using the options below. If
  1110. you are compiling a kernel for the EBSA-110 or the LART however, the
  1111. red LED will simply flash regularly to indicate that the system is
  1112. still functional. It is safe to say Y here if you have a CATS
  1113. system, but the driver will do nothing.
  1114. config LEDS_TIMER
  1115. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1116. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1117. || MACH_OMAP_PERSEUS2
  1118. depends on LEDS
  1119. depends on !GENERIC_CLOCKEVENTS
  1120. default y if ARCH_EBSA110
  1121. help
  1122. If you say Y here, one of the system LEDs (the green one on the
  1123. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1124. will flash regularly to indicate that the system is still
  1125. operational. This is mainly useful to kernel hackers who are
  1126. debugging unstable kernels.
  1127. The LART uses the same LED for both Timer LED and CPU usage LED
  1128. functions. You may choose to use both, but the Timer LED function
  1129. will overrule the CPU usage LED.
  1130. config LEDS_CPU
  1131. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1132. !ARCH_OMAP) \
  1133. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1134. || MACH_OMAP_PERSEUS2
  1135. depends on LEDS
  1136. help
  1137. If you say Y here, the red LED will be used to give a good real
  1138. time indication of CPU usage, by lighting whenever the idle task
  1139. is not currently executing.
  1140. The LART uses the same LED for both Timer LED and CPU usage LED
  1141. functions. You may choose to use both, but the Timer LED function
  1142. will overrule the CPU usage LED.
  1143. config ALIGNMENT_TRAP
  1144. bool
  1145. depends on CPU_CP15_MMU
  1146. default y if !ARCH_EBSA110
  1147. select HAVE_PROC_CPU if PROC_FS
  1148. help
  1149. ARM processors cannot fetch/store information which is not
  1150. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1151. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1152. fetch/store instructions will be emulated in software if you say
  1153. here, which has a severe performance impact. This is necessary for
  1154. correct operation of some network protocols. With an IP-only
  1155. configuration it is safe to say N, otherwise say Y.
  1156. config UACCESS_WITH_MEMCPY
  1157. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1158. depends on MMU && EXPERIMENTAL
  1159. default y if CPU_FEROCEON
  1160. help
  1161. Implement faster copy_to_user and clear_user methods for CPU
  1162. cores where a 8-word STM instruction give significantly higher
  1163. memory write throughput than a sequence of individual 32bit stores.
  1164. A possible side effect is a slight increase in scheduling latency
  1165. between threads sharing the same address space if they invoke
  1166. such copy operations with large buffers.
  1167. However, if the CPU data cache is using a write-allocate mode,
  1168. this option is unlikely to provide any performance gain.
  1169. endmenu
  1170. menu "Boot options"
  1171. # Compressed boot loader in ROM. Yes, we really want to ask about
  1172. # TEXT and BSS so we preserve their values in the config files.
  1173. config ZBOOT_ROM_TEXT
  1174. hex "Compressed ROM boot loader base address"
  1175. default "0"
  1176. help
  1177. The physical address at which the ROM-able zImage is to be
  1178. placed in the target. Platforms which normally make use of
  1179. ROM-able zImage formats normally set this to a suitable
  1180. value in their defconfig file.
  1181. If ZBOOT_ROM is not enabled, this has no effect.
  1182. config ZBOOT_ROM_BSS
  1183. hex "Compressed ROM boot loader BSS address"
  1184. default "0"
  1185. help
  1186. The base address of an area of read/write memory in the target
  1187. for the ROM-able zImage which must be available while the
  1188. decompressor is running. It must be large enough to hold the
  1189. entire decompressed kernel plus an additional 128 KiB.
  1190. Platforms which normally make use of ROM-able zImage formats
  1191. normally set this to a suitable value in their defconfig file.
  1192. If ZBOOT_ROM is not enabled, this has no effect.
  1193. config ZBOOT_ROM
  1194. bool "Compressed boot loader in ROM/flash"
  1195. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1196. help
  1197. Say Y here if you intend to execute your compressed kernel image
  1198. (zImage) directly from ROM or flash. If unsure, say N.
  1199. config CMDLINE
  1200. string "Default kernel command string"
  1201. default ""
  1202. help
  1203. On some architectures (EBSA110 and CATS), there is currently no way
  1204. for the boot loader to pass arguments to the kernel. For these
  1205. architectures, you should supply some command-line options at build
  1206. time by entering them here. As a minimum, you should specify the
  1207. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1208. config XIP_KERNEL
  1209. bool "Kernel Execute-In-Place from ROM"
  1210. depends on !ZBOOT_ROM
  1211. help
  1212. Execute-In-Place allows the kernel to run from non-volatile storage
  1213. directly addressable by the CPU, such as NOR flash. This saves RAM
  1214. space since the text section of the kernel is not loaded from flash
  1215. to RAM. Read-write sections, such as the data section and stack,
  1216. are still copied to RAM. The XIP kernel is not compressed since
  1217. it has to run directly from flash, so it will take more space to
  1218. store it. The flash address used to link the kernel object files,
  1219. and for storing it, is configuration dependent. Therefore, if you
  1220. say Y here, you must know the proper physical address where to
  1221. store the kernel image depending on your own flash memory usage.
  1222. Also note that the make target becomes "make xipImage" rather than
  1223. "make zImage" or "make Image". The final kernel binary to put in
  1224. ROM memory will be arch/arm/boot/xipImage.
  1225. If unsure, say N.
  1226. config XIP_PHYS_ADDR
  1227. hex "XIP Kernel Physical Location"
  1228. depends on XIP_KERNEL
  1229. default "0x00080000"
  1230. help
  1231. This is the physical address in your flash memory the kernel will
  1232. be linked for and stored to. This address is dependent on your
  1233. own flash usage.
  1234. config KEXEC
  1235. bool "Kexec system call (EXPERIMENTAL)"
  1236. depends on EXPERIMENTAL
  1237. help
  1238. kexec is a system call that implements the ability to shutdown your
  1239. current kernel, and to start another kernel. It is like a reboot
  1240. but it is independent of the system firmware. And like a reboot
  1241. you can start any kernel with it, not just Linux.
  1242. It is an ongoing process to be certain the hardware in a machine
  1243. is properly shutdown, so do not be surprised if this code does not
  1244. initially work for you. It may help to enable device hotplugging
  1245. support.
  1246. config ATAGS_PROC
  1247. bool "Export atags in procfs"
  1248. depends on KEXEC
  1249. default y
  1250. help
  1251. Should the atags used to boot the kernel be exported in an "atags"
  1252. file in procfs. Useful with kexec.
  1253. endmenu
  1254. menu "CPU Power Management"
  1255. if ARCH_HAS_CPUFREQ
  1256. source "drivers/cpufreq/Kconfig"
  1257. config CPU_FREQ_SA1100
  1258. bool
  1259. config CPU_FREQ_SA1110
  1260. bool
  1261. config CPU_FREQ_INTEGRATOR
  1262. tristate "CPUfreq driver for ARM Integrator CPUs"
  1263. depends on ARCH_INTEGRATOR && CPU_FREQ
  1264. default y
  1265. help
  1266. This enables the CPUfreq driver for ARM Integrator CPUs.
  1267. For details, take a look at <file:Documentation/cpu-freq>.
  1268. If in doubt, say Y.
  1269. config CPU_FREQ_PXA
  1270. bool
  1271. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1272. default y
  1273. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1274. config CPU_FREQ_S3C64XX
  1275. bool "CPUfreq support for Samsung S3C64XX CPUs"
  1276. depends on CPU_FREQ && CPU_S3C6410
  1277. config CPU_FREQ_S3C
  1278. bool
  1279. help
  1280. Internal configuration node for common cpufreq on Samsung SoC
  1281. config CPU_FREQ_S3C24XX
  1282. bool "CPUfreq driver for Samsung S3C24XX series CPUs"
  1283. depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
  1284. select CPU_FREQ_S3C
  1285. help
  1286. This enables the CPUfreq driver for the Samsung S3C24XX family
  1287. of CPUs.
  1288. For details, take a look at <file:Documentation/cpu-freq>.
  1289. If in doubt, say N.
  1290. config CPU_FREQ_S3C24XX_PLL
  1291. bool "Support CPUfreq changing of PLL frequency"
  1292. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1293. help
  1294. Compile in support for changing the PLL frequency from the
  1295. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1296. after a frequency change, so by default it is not enabled.
  1297. This also means that the PLL tables for the selected CPU(s) will
  1298. be built which may increase the size of the kernel image.
  1299. config CPU_FREQ_S3C24XX_DEBUG
  1300. bool "Debug CPUfreq Samsung driver core"
  1301. depends on CPU_FREQ_S3C24XX
  1302. help
  1303. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1304. config CPU_FREQ_S3C24XX_IODEBUG
  1305. bool "Debug CPUfreq Samsung driver IO timing"
  1306. depends on CPU_FREQ_S3C24XX
  1307. help
  1308. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1309. config CPU_FREQ_S3C24XX_DEBUGFS
  1310. bool "Export debugfs for CPUFreq"
  1311. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1312. help
  1313. Export status information via debugfs.
  1314. endif
  1315. source "drivers/cpuidle/Kconfig"
  1316. endmenu
  1317. menu "Floating point emulation"
  1318. comment "At least one emulation must be selected"
  1319. config FPE_NWFPE
  1320. bool "NWFPE math emulation"
  1321. depends on !AEABI || OABI_COMPAT
  1322. ---help---
  1323. Say Y to include the NWFPE floating point emulator in the kernel.
  1324. This is necessary to run most binaries. Linux does not currently
  1325. support floating point hardware so you need to say Y here even if
  1326. your machine has an FPA or floating point co-processor podule.
  1327. You may say N here if you are going to load the Acorn FPEmulator
  1328. early in the bootup.
  1329. config FPE_NWFPE_XP
  1330. bool "Support extended precision"
  1331. depends on FPE_NWFPE
  1332. help
  1333. Say Y to include 80-bit support in the kernel floating-point
  1334. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1335. Note that gcc does not generate 80-bit operations by default,
  1336. so in most cases this option only enlarges the size of the
  1337. floating point emulator without any good reason.
  1338. You almost surely want to say N here.
  1339. config FPE_FASTFPE
  1340. bool "FastFPE math emulation (EXPERIMENTAL)"
  1341. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1342. ---help---
  1343. Say Y here to include the FAST floating point emulator in the kernel.
  1344. This is an experimental much faster emulator which now also has full
  1345. precision for the mantissa. It does not support any exceptions.
  1346. It is very simple, and approximately 3-6 times faster than NWFPE.
  1347. It should be sufficient for most programs. It may be not suitable
  1348. for scientific calculations, but you have to check this for yourself.
  1349. If you do not feel you need a faster FP emulation you should better
  1350. choose NWFPE.
  1351. config VFP
  1352. bool "VFP-format floating point maths"
  1353. depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1354. help
  1355. Say Y to include VFP support code in the kernel. This is needed
  1356. if your hardware includes a VFP unit.
  1357. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1358. release notes and additional status information.
  1359. Say N if your target does not have VFP hardware.
  1360. config VFPv3
  1361. bool
  1362. depends on VFP
  1363. default y if CPU_V7
  1364. config NEON
  1365. bool "Advanced SIMD (NEON) Extension support"
  1366. depends on VFPv3 && CPU_V7
  1367. help
  1368. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1369. Extension.
  1370. endmenu
  1371. menu "Userspace binary formats"
  1372. source "fs/Kconfig.binfmt"
  1373. config ARTHUR
  1374. tristate "RISC OS personality"
  1375. depends on !AEABI
  1376. help
  1377. Say Y here to include the kernel code necessary if you want to run
  1378. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1379. experimental; if this sounds frightening, say N and sleep in peace.
  1380. You can also say M here to compile this support as a module (which
  1381. will be called arthur).
  1382. endmenu
  1383. menu "Power management options"
  1384. source "kernel/power/Kconfig"
  1385. config ARCH_SUSPEND_POSSIBLE
  1386. def_bool y
  1387. endmenu
  1388. source "net/Kconfig"
  1389. source "drivers/Kconfig"
  1390. source "fs/Kconfig"
  1391. source "arch/arm/Kconfig.debug"
  1392. source "security/Kconfig"
  1393. source "crypto/Kconfig"
  1394. source "lib/Kconfig"